In a post on the official Twitter blog, Twitter product manager Sachin Agarwal wrote, "If you've checked your Direct Messages today, you may have noticed that something's missing: the limitation of 140 characters. You can now chat on (and on) in a single Direct Message, and likely still have some characters left over."

While Twitter is largely a public experience, Direct Messages let you have private conversations about the memes, news, movements, and events that unfold on Twitter.

"Each of the hundreds of millions of Tweets sent across Twitter every day is an opportunity for you to spark a conversation about what's happening in your world," he posted.

"That is why we have made a number of changes to Direct Messages over the last few months. Today's change is another big step towards making the private side of Twitter even more powerful and fun," Agarwal noted.

Tweets will continue to be the 140 characters, rich with photos, videos, links, Vines, gifs, and emoji.

The change is available for Android and iOS apps, twitter.com, TweetDeck and Twitter for Mac.